In the end, President Obama won the coveted endorsement of New York City Mayor Michael Bloomberg. But it wasn't Obama's visits or entreaties that sealed it. It was Hurricane Sandy's. Bloomberg endorsed Obama in an op-ed yesterday, arguing that Hurricane Sandy and other extreme weather events may not be directly caused by climate change, but that the risk that they are requires action by elected officials. Republican nominee Mitt Romney has backed off his previous pledges to act on climate change, Bloomberg said, making Obama the preferred choice.